Question

ABCD is cyclic quadrilateral, if measure of angle ABC=105° then m of angle ADC =
( 75,90,105,180)​

Answer 1

Answer:

75°

1st option

Step-by-step explanation:

Opposite angles of cyclic quadrilateral are supplementary.

angle ABC + angle ADC = 180°

105° + angle ADC =180°

angle ADC =180°-105°

angle ADC=75°